Chromatic dispersion compensator (CDC) in a photonic integrated circuit (PIC) chip and method of operation

    公开(公告)号:US20050111848A1

    公开(公告)日:2005-05-26

    申请号:US10971890

    申请日:2004-10-22

    IPC分类号: G02B6/34 H04B10/18 H04B10/12

    摘要: An optical equalizer/dispersion compensator (E/CDC) comprises an input/output for receiving a multiplexed channel signal comprising a plurality of channel signals of different wavelengths. An optical amplifier may be coupled to receive, as an input/output, the multiplexed channel signals which amplifier may be a semiconductor optical amplifier (SOA) or a gain clamped-semiconductor optical amplifier (GC-SOA). A variable optical attenuator (VOA) is coupled to the optical amplifier and a chromatic dispersion compensator (CDC) is coupled to the variable optical attenuator. A mirror or Faraday rotator mirror (FRM) is coupled to the chromatic dispersion compensator to reflect the multiplexed channel signal back through optical components comprising the chromatic dispersion compensator, the variable optical attenuator and the optical amplifier so that the multiplexed channel signal is corrected partially for equalization and chromatic dispersion compensation with respect to each pass through these optical components. The E/CDC components may be integrated in a photonic integrated circuit (PIC) chip. In several embodiments, a photonic integrated circuit (PIC) chip comprises an input into the chip that receives at least one channel signal having experienced chromatic dispersion, a chromatic dispersion compensator (CDC) that separates the at least one channel signal into separate wavelength components over a free spectral range (FSR) spanning only a signal channel width and subjects the wavelength components to a phase shift to change the wavelength group delay in the wavelength components and that recombines the wavelength components to reconstitute the at least one channel signal, and an output from the chip for the recombined at least one channel signal having reduced chromatic dispersion compared to the same channel signal received at the chip input. The CDC device may include a tuning section to vary the phase shift of wavelength components as they propagate through the device. Such a CDC device may include a Mach-Zehnder interferometer (MZI) or a cascaded group of Mach-Zehnder interferometers, or at least one arrayed waveguide grating (AWG) or at least one Echelle grating.

    Optical transmission systems including signal varying devices and methods
    10.
    发明申请
    Optical transmission systems including signal varying devices and methods 有权
    光传输系统包括信号变化装置和方法

    公开(公告)号:US20050046929A1

    公开(公告)日:2005-03-03

    申请号:US10914109

    申请日:2004-08-09

    摘要: Optical systems of the present invention include a plurality of optical processing nodes in optical communication via a plurality of signal varying devices. A first signal varying device includes an optical fiber configured to produce Raman scattering/gain in a signal wavelength range and a first signal variation profile. A first pump source is configured provides sufficient pump power in a plurality of first pump wavelengths to stimulate Raman scattering/gain in the optical fiber within the signal wavelength range. A second signal varying device is provided having a second signal variation profile to produce a cumulative signal variation profile that differs from the first and second signal variation profiles

    摘要翻译: 本发明的光学系统包括经由多个信号变化装置进行光通信的多个光学处理节点。 第一信号变化装置包括被配置为在信号波长范围内产生拉曼散射/增益的光纤和第一信号变化曲线。 第一泵浦源被配置为在多个第一泵浦波长中提供足够的泵浦功率以在信号波长范围内激发光纤中的拉曼散射/增益。 提供了具有第二信号变化特征的第二信号变化装置,以产生不同于第一和第二信号变化曲线的累积信号变化曲线